Gnaptorina (Boreoptorina) ampliptera, Bai & Li & Ren, 2020

Bai, Xing-Long, Li, Xiu-Min & Ren, Guo-Dong, 2020, Description of a new subgenus and four new species of Gnaptorina Reitter, 1887 (Coleoptera: Tenebrionidae: Blaptini) from China, Zootaxa 4809 (1), pp. 165-176 : 172-175

Gnaptorina (Boreoptorina) ampliptera sp. n.

( Figs 5 , 13–14 )

Type material. Holotype: ♂ ( MHBU) ( Fig. 13 ), labeled “ 2016-VIII-6 / nṃẽhƃHä̛ [ Baiya Township , Dêgê County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian- Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°30.425′ N / 98°43.635′ E / Alt. 3021 / ā ẛƛṽḓḣú [Museum of Hebei University]” . Paratypes: 1♂ [in ethanol] 1♀ ( MHBU), same data as holotype ; 1♂ 3♀ ( MHBU), labeled “ 2011-VII-26 / nṃuōẽhḙä [Jangra Township, Dêgê County, Garzê Zhou [similar to City ], Sichuan] / " Dz ̏̐ [ Guo-Dong Ren et al. leg.] / āẛƛṽḓḣú [ Museum of Hebei University ]” ; 1♂

[ in ethanol] ( MHBU), labeled “ 2016-VIII-6 / nṃHṮƃṙơ̈ [Jinsha Township, Baiyü County, Sichuan] / Ī ṯü H̎̋ Ĵĸ¨ DZİē [ Xiu-Min Li , Xing-Long Bai , Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽ ḓḣú [ Museum of Hebei University ]” // “ 31°16.522′ N / 98°48.017′ E / Alt. 2980 / āẛƛṽḓḣú [Museum of Hebei University]”. Types have the additional label “ HOLOTYPE (and PARATYPE, respectively) / Gnaptorina ampliptera sp. n. / Det. Bai Xinglong, 2018” .

Description. Body black, weakly shiny; antennae, palpi and tarsi brown.

Male ( Figs 5 A–J, 13). Head ( Fig. 5A ). Anterior margin of epistome weakly emarginate. Lateral margins of head straight above antennal base. Genal margins converging before eyes. Eyes transverse, not protruding beyond contour of head. Dorsal surface of head flat, with dense and moderately coarse punctures. Antennae ( Fig. 5B ) slender and long, reaching beyond pronotal base; antennomeres 4–7 long and cylindrical, 8–10 spherical, 11 oval; length (width) ratio of antennomeres 2–11 28(25): 58(24): 33(22): 34(22): 36(23): 39(24): 35(33): 34(31): 33(33): 48(32).

Prothorax. Pronotum ( Fig. 5C ) transverse, 1.3 times as wide as long, 2.3 times as wide as head. Lateral sides widest at middle, ratio of width at anterior margin to widest part and base 24: 42: 42. Anterior margin weakly emarginate, laterally beaded; lateral margins subparallel from base to middle and narrowing toward anterior angles arcuately, weakly emarginate before posterior angles, finely beaded along entire length; posterior margin straight, laterally beaded. Anterior angles obtuse, posterior ones rectangular. Disc convex, with shallow and round depressions laterally before base, surface with dense and fine punctures. Prothoracic hypomera weakly concave, smooth, with longitudinal wrinkles and sparse and tiny granules. Prosternal process steeply sloping behind procoxae and forming wide and flat prominence at end of declivity.

Pterothorax. Elytra widely oval and convex, 1.2 times as long as wide, 1.3 times as wide as pronotum, widest at middle. Surface with shallow fine and sparse punctures and irregular short wrinkles. Lateral margins reaching sutural elytral angle, visible dorsally in anterior third and apex. Surface of epipleura smooth, with shallow wrinkles.

Abdomen. Ventrites almost without setae, 1–3 with longitudinal wrinkles, apex of 3 and 4–5 with punctures.

Legs ( Fig. 5 D–H) strong. Protibiae weakly “S” curved, upper apical spur as long as protarsomere 1, lower apical spur absent; ventral surface of protarsomere 1 with hairy brush at apex. Mesotibiae weakly curved; ventral surface of mesotarsi without hairy brush. Metatibiae weakly curved. Ratio of length (width) of pro-, meso- and metatibiae 27(5): 29(5): 37(7), that of metatarsomeres 1–4 9(3): 6(2): 5(2): 9(2).

Aedeagus ( Fig. 5 I–J) 2.3 mm long and 0.5 mm wide. Parameres 0.8 mm long and 0.4 mm wide, widest at base and arcuately narrowing from basal 1/3 to apex laterally in dorsal view; dorsal side weakly convex, slightly curved to ventral side apically in lateral view.

Female ( Fig. 14 ). Body wider than male. Antennae not reaching pronotal base, antennomeres 4–7 short and cylindrical. Upper apical spur of protibiae wide and flat, longer than protarsomeres 1 and 2 combined; ventral surface of protarsi without hairy brush. Lateral sides of apical spurs of mesotibiae subparallel. Inner apical spur of metatibiae strongly widened at apex.

Measurements. Body length: ♂ 11.0– 11.2 mm, ♀ 10.1–12.0 mm; width: ♂ 5.6–5.9 mm, ♀ 5.4–6.7 mm.

Etymology. This species is named from the Latin adjective “ amplus, -a, -um ” (= wide, broad) and from “ πτεΡΟΝ ” (Greek, = wing, feather), in reference to its widened elytra.

Distribution. China: Sichuan.

Diagnosis. This new species is morphologically very similar to G. platytarsia Li & Ren, 2004 , but can be distinguished from the latter by the following male character states: (1) lateral margins of head straight above antennal base (concave in G. platytarsia ); (2) antennomeres 4–7 long and cylindrical (short and cylindrical in G. platytarsia ); (3) protibiae weakly “S” curved (straight in G. platytarsia ); (4) protarsomeres 1–3 not widened, nearly as wide as 4, ventral surface of protarsomere 1 with hairy brush at apex (widened, much wider than 4, 1–3 with hairy brush, 4 with hairy tuft at apex in G. platytarsia ); (5) ventral surface of mesotarsi without hairy brush (mesotarsomeres 1–2 with in G. platytarsia ); (6) parameres narrow and long (wide and short in G. platytarsia , Fig. 39 in Li & Ren, 2004).

Figures

FIGURE 5. Characters. Gnaptorina (Boreoptorina) ampliptera sp. n. (male). A. head; B. antenna; C. pronotum; D. apex of profemur; E. protibia; F. protarsus; G. mesotarsus; H. metatibia; I–J. aedeagus in dorsal and lateral view. Scale bars: 0.5 mm.

FIGURES 6–14. Habitus. 6. Gnaptorina longicornis (male); 7–8. G. polita (7. male, holotype; 8. female, paratype); 9–10. G. artipenis (9. male, holotype; 10. female, paratype); 11–12. G. crenata (11. male, holotype; 12. female, paratype); 13–14. G. ampliptera (13. male, holotype; 14. female, paratype).